GB2096303A - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
GB2096303A
GB2096303A GB8209633A GB8209633A GB2096303A GB 2096303 A GB2096303 A GB 2096303A GB 8209633 A GB8209633 A GB 8209633A GB 8209633 A GB8209633 A GB 8209633A GB 2096303 A GB2096303 A GB 2096303A
Authority
GB
United Kingdom
Prior art keywords
heat exchanger
pipes
tank
sealing material
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB8209633A
Other versions
GB2096303B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Motor Co
Original Assignee
Ford Motor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ford Motor Co filed Critical Ford Motor Co
Publication of GB2096303A publication Critical patent/GB2096303A/en
Application granted granted Critical
Publication of GB2096303B publication Critical patent/GB2096303B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/162—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using bonding or sealing substances, e.g. adhesives

Abstract

A heat exchanger, in particular for motor vehicles, has a block formed of metal pipes 2 held at one or both ends by cooling fins 3. To secure the block to the supply or return tank 1, with the pipe ends 9 suitably sealed, a sealing material 8, which remains elastic on setting, is placed around the sockets 5 and allowed to set partially. The block is then secured in position by self- tapping screws 10 which engage directly into the cooling fins 3. <IMAGE>

Description

SPECIFICATION Heat exchanger The invention relates to a heat exchanger.
There is known from German Patent DE-AS 27-28-827 a heat exchanger in which metal pipes, interconnected by cooling fins to form a heat exchanger core or block, are connected to a tank and suitably sealed. To effect sealing, the ends of the pipes are sunk into a plastics sealing material before it sets and bonded to the radiator tank by heating to 1400C2000Cfor approximately two minutes.
The known heat exchanger has the disadvantage that in the manufacture of largevolume parts, radiators, condensers etc., a significant expenditure of energy is required for the heat treatment and it is not possible to carry out repairs to heat exchangers straight forwardly.
From German Offenlegungsschrift 23 02 770 a further heat exchanger is known in which the ends of the pipes are held against the tank with constant contact pressure applied by means of detachable ciamping tools between the radiator tank and the bundle of pipes after the placing of sealing material on the outer surface of the radiator tank.
This known heat exchanger requires only an insignificant expenditure of heat energy in its manufacture, but has the disadvantage that the sealing material placed on the outside of the tank must form a seal both with the radiator tank and with the pipe ends of the bundle of pipes and can easily slip out of position during assembly and during any repairs which may be made.
From German Patent DYE AS 25 09 717 there is known a seal for pipes connected to a plate which is stuck to the pipe ends in the form of a firmly adhesive rubber-eiastic sealing material at the points where the pipes are joined to the plate.
This sealing arrangement in fact avoids the abovementioned slipping out of position of the sealant, but makes it difficult to apply the sealing material to the pipe-ends.
The invention seeks to provide an improved heat exchanger in which assembly and repair can be carried out simply without excessive energy consumption.
According to the present invention, there is provided a heat exchanger comprising a plurality of pipes interconnected by cooling fins to form a heat exchanger block and a tank connected to the pipes at least at one end of the block, wherein the tank is provided with sockets for receiving the ends of the pipes and a sealing material in the sockets serves to seal the ends of the pipes relative to the tank, and wherein the block is secured to the tank by means of screws which directly engage the cooling fins.
Preferably, the sealing material is a material such as silicone rubber which remains permanently elastic after setting and the block is assembled only after partial setting of the sealing material in the sockets.
When the sealing material is bonded to the material of the radiator tank there is here only one sealing surface namely that between the sealing material and the pipe-ends, which makes possible a better and more reliable seal.
Conveniently the screws are self-tapping screws which are screwed into a large number of cooling fins.
Despite the ease and simplicity of the fixing arrangementa reliable maintenance of the contact pressure is ensured.
The invention as described will now be described further, by way of example, with reference to accompanying drawing, in which: Fig. 1. is a view of a heat exchanger according to the invention, and Fig. 2. is a section taken along the line Il-Il in Fig. 1 from which the sealing and fixing can be seen more clearly.
The heat exchanger shown in the Figures consists of a tank 1 made in one piece of plastics material and divided into a supply and a return chamber and corresponding supply and discharge pipes. The tank 1 is connected to a bundle of pipes 4 forming the heat exchanger core or block 11 consisting of a number of water pipes 2 made of metal and held together by cooling fins 3 made of aluminium.
The radiator tank is provided on its outer surface with a number of sockets 5 which have surrounding annular flanges 6 defining axially open annular grooves 7.
A sealing material 8 is placed in the grooves 7 which material remains permanently elastic after setting. The material used can be for example silicone rubber.
After the sealing material 8 has slightly hardened the pipe-ends 9 of the water pipes 2 of the bundle of pipes 4 are placed on the sealing material 8 and kept under constant contact pressure. The latter pressure is applied by screwed connections between the tank 1 and the heat exchanger block 11 comprising self-tapping screws 10 screwed directly into the cooling fins 3.
The selection of a self-tapping screw 10 is made such that its pitch is related to the number of cooling fins 3, which thus ensures a reliable holding of this surprisingly simple fixing.
By placing the pipe-ends 9 of the heat exchanger block 11 onto the only partially set sealing material 8 it is possible to achieve a particularly favourable meeting of the sealing surfaces. Investigations have shown in this respect that the fixing by means of self-tapping screws 10 screwed directly into the cooling fins 3 can be detached several times for repair purposes and screwed back up again, without detriment to the security of the fixing. It can be readily seen that the improved sealing, together with the simplified fixing leads to a considerable saving of costs during manufacture and assembly of the heat exchanger.
1. A heat exchanger comprising a plurality of pipes interconnected by cooling fins to form a heat
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Heat exchanger The invention relates to a heat exchanger. There is known from German Patent DE-AS 27-28-827 a heat exchanger in which metal pipes, interconnected by cooling fins to form a heat exchanger core or block, are connected to a tank and suitably sealed. To effect sealing, the ends of the pipes are sunk into a plastics sealing material before it sets and bonded to the radiator tank by heating to 1400C2000Cfor approximately two minutes. The known heat exchanger has the disadvantage that in the manufacture of largevolume parts, radiators, condensers etc., a significant expenditure of energy is required for the heat treatment and it is not possible to carry out repairs to heat exchangers straight forwardly. From German Offenlegungsschrift 23 02 770 a further heat exchanger is known in which the ends of the pipes are held against the tank with constant contact pressure applied by means of detachable ciamping tools between the radiator tank and the bundle of pipes after the placing of sealing material on the outer surface of the radiator tank. This known heat exchanger requires only an insignificant expenditure of heat energy in its manufacture, but has the disadvantage that the sealing material placed on the outside of the tank must form a seal both with the radiator tank and with the pipe ends of the bundle of pipes and can easily slip out of position during assembly and during any repairs which may be made. From German Patent DYE AS 25 09 717 there is known a seal for pipes connected to a plate which is stuck to the pipe ends in the form of a firmly adhesive rubber-eiastic sealing material at the points where the pipes are joined to the plate. This sealing arrangement in fact avoids the abovementioned slipping out of position of the sealant, but makes it difficult to apply the sealing material to the pipe-ends. The invention seeks to provide an improved heat exchanger in which assembly and repair can be carried out simply without excessive energy consumption. According to the present invention, there is provided a heat exchanger comprising a plurality of pipes interconnected by cooling fins to form a heat exchanger block and a tank connected to the pipes at least at one end of the block, wherein the tank is provided with sockets for receiving the ends of the pipes and a sealing material in the sockets serves to seal the ends of the pipes relative to the tank, and wherein the block is secured to the tank by means of screws which directly engage the cooling fins. Preferably, the sealing material is a material such as silicone rubber which remains permanently elastic after setting and the block is assembled only after partial setting of the sealing material in the sockets. When the sealing material is bonded to the material of the radiator tank there is here only one sealing surface namely that between the sealing material and the pipe-ends, which makes possible a better and more reliable seal. Conveniently the screws are self-tapping screws which are screwed into a large number of cooling fins. Despite the ease and simplicity of the fixing arrangementa reliable maintenance of the contact pressure is ensured. The invention as described will now be described further, by way of example, with reference to accompanying drawing, in which: Fig. 1. is a view of a heat exchanger according to the invention, and Fig. 2. is a section taken along the line Il-Il in Fig. 1 from which the sealing and fixing can be seen more clearly. The heat exchanger shown in the Figures consists of a tank 1 made in one piece of plastics material and divided into a supply and a return chamber and corresponding supply and discharge pipes. The tank 1 is connected to a bundle of pipes 4 forming the heat exchanger core or block 11 consisting of a number of water pipes 2 made of metal and held together by cooling fins 3 made of aluminium. The radiator tank is provided on its outer surface with a number of sockets 5 which have surrounding annular flanges 6 defining axially open annular grooves 7. A sealing material 8 is placed in the grooves 7 which material remains permanently elastic after setting. The material used can be for example silicone rubber. After the sealing material 8 has slightly hardened the pipe-ends 9 of the water pipes 2 of the bundle of pipes 4 are placed on the sealing material 8 and kept under constant contact pressure. The latter pressure is applied by screwed connections between the tank 1 and the heat exchanger block 11 comprising self-tapping screws 10 screwed directly into the cooling fins 3. The selection of a self-tapping screw 10 is made such that its pitch is related to the number of cooling fins 3, which thus ensures a reliable holding of this surprisingly simple fixing. By placing the pipe-ends 9 of the heat exchanger block 11 onto the only partially set sealing material 8 it is possible to achieve a particularly favourable meeting of the sealing surfaces. Investigations have shown in this respect that the fixing by means of self-tapping screws 10 screwed directly into the cooling fins 3 can be detached several times for repair purposes and screwed back up again, without detriment to the security of the fixing. It can be readily seen that the improved sealing, together with the simplified fixing leads to a considerable saving of costs during manufacture and assembly of the heat exchanger. CLAIMS
1. A heat exchanger comprising a plurality of pipes interconnected by cooling fins to form a heat exchanger block and a tank connected to the pipes at least at one end of the block, wherein the tank is provided with sockets for receiving the ends of the pipes and a sealing material in the sockets serves to seal the ends of the pipes relative to the tank, and wherein the block is secured to the tank by means of screws which directly engage the cooling fins.
2. A heat exchanger as claimed in Claim 1, in which the sealing material is a material, such as silicone rubber, which remains elastic after setting and in which the block is assembled with the tank only after partial setting of the sealing material within the sockets.
3. A heat exchanger as claimed in claim 1 or 2, in which the screws are self-tapping screws which engage a large number of cooling fins and have a pitch related to the fin separation.
4. A heat exchanger constructed substantially as herein described with reference to and as illustrated in the accompanying drawings.
GB8209633A 1981-04-04 1982-04-01 Heat exchanger Expired GB2096303B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813113702 DE3113702C1 (en) 1981-04-04 1981-04-04 Heat exchangers, in particular for motor vehicles

Publications (2)

Publication Number Publication Date
GB2096303A true GB2096303A (en) 1982-10-13
GB2096303B GB2096303B (en) 1984-03-21

Family

ID=6129389

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8209633A Expired GB2096303B (en) 1981-04-04 1982-04-01 Heat exchanger

Country Status (2)

Country Link
DE (1) DE3113702C1 (en)
GB (1) GB2096303B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504034A1 (en) * 1991-03-12 1992-09-16 Valeo Thermique Moteur Heat exchanger with connected water boxes for cars
DE102008045870A1 (en) 2008-09-04 2010-03-11 Modine Manufacturing Co., Racine Fastening arrangement for use in heat exchanger arrangement in air conditioning system of motor vehicle, has fastening elements extending in form of pins through cooling networks, where pins exhibit stopper, spacer piece and locking piece
USD968646S1 (en) 2021-07-21 2022-11-01 Msg Entertainment Group, Llc Building

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319006A1 (en) * 1993-06-08 1994-12-15 Thermo Technik Holding Ag Heater/radiator (cooler) seal
US20080053645A1 (en) * 2006-08-31 2008-03-06 Denso Corporation Heat exchanger and manufacture method for the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2509717B2 (en) * 1975-03-06 1981-02-05 Volkswagenwerk Ag, 3180 Wolfsburg Seal for a tube sheet of light metal heat exchangers through which liquid flows, and process for their production
DE2728827B2 (en) * 1977-06-27 1979-05-03 Ford-Werke Ag, 5000 Koeln Heat exchangers, in particular for motor vehicles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504034A1 (en) * 1991-03-12 1992-09-16 Valeo Thermique Moteur Heat exchanger with connected water boxes for cars
FR2674014A1 (en) * 1991-03-12 1992-09-18 Valeo Thermique Moteur Sa HEAT EXCHANGER WITH CONNECTED WATER BOXES FOR MOTOR VEHICLES.
DE102008045870A1 (en) 2008-09-04 2010-03-11 Modine Manufacturing Co., Racine Fastening arrangement for use in heat exchanger arrangement in air conditioning system of motor vehicle, has fastening elements extending in form of pins through cooling networks, where pins exhibit stopper, spacer piece and locking piece
USD968646S1 (en) 2021-07-21 2022-11-01 Msg Entertainment Group, Llc Building

Also Published As

Publication number Publication date
GB2096303B (en) 1984-03-21
DE3113702C1 (en) 1982-11-11

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee